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    <title>Document</title>
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        <h2 v-pre>vue学习</h2>  
        <h2 >当前的n值是{{n}}</h2>
        <button @click="n++">点我n+1</button>
    </div>
    <script>
        Vue.config.productionTip = false
        var v = new Vue({
            el:'#app',
            data:{
                n:1
            },
            methods:{}
        })
        
    </script>
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